1. Department of Gastrointestinal Surgery Peking University Shougang Hospital Beijing China
2. Department of General Surgery Peking University First Hospital Beijing China
3. Department of Plastic Surgery and Burn Peking University First Hospital Beijing China
4. Department of Gastrointestinal Surgery Peking University Cancer Hospital Beijing China
5. Peking University International Cancer Institute Beijing China
6. Peking‐Tsinghua Center for Life Science Beijing China